{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3697585d-ac0d-487b-8d9c-a128ab616565",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Hello world\n",
    "\n",
    "下面的代码讲解如何写Hello world"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "bacd979f-f1e2-46b7-8760-9393f1806594",
   "metadata": {},
   "outputs": [],
   "source": [
    "for i in range(100):\n",
    "    print(i)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "a29365f6-93f8-4bcf-8481-d9d96cdfcc7c",
   "metadata": {},
   "source": [
    "\"HELLO\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "f4320954-775b-4db7-844b-efae7610c460",
   "metadata": {},
   "outputs": [],
   "source": [
    "name = 'maishu'\n",
    "name.lower()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "8799a462-112c-42fd-9717-4727df68772e",
   "metadata": {},
   "outputs": [],
   "source": [
    "print('maishu')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "463326c8-f805-4ce0-9981-b4c19a9f3123",
   "metadata": {},
   "outputs": [],
   "source": [
    "%%time\n",
    "\n",
    "print('maishu')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "12d2f865-195e-48ea-920a-246fb2e7f6ec",
   "metadata": {},
   "outputs": [],
   "source": [
    "%lsmagic"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "fdedc815-fdd5-4466-b6c3-b1e54f7910e9",
   "metadata": {},
   "outputs": [],
   "source": [
    "%%sh\n",
    "ls -l"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "a2e9d0bb-b12a-4b5c-bdac-166fdaaa656d",
   "metadata": {},
   "outputs": [],
   "source": [
    "%timeit 3+2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "d8ddeaa1-f448-4006-9bc0-ba6f86fe9541",
   "metadata": {},
   "outputs": [],
   "source": [
    "%%HTML\n",
    "\n",
    "<iframe src=\"https://www.bilibili.com/video/BV1614y1b7Bm?spm_id_from=333.337.search-card.all.click\"></iframe>"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "f5e8a1bd-bec2-4e93-a411-c920dad3ecc4",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "'pwd' 不是内部或外部命令，也不是可运行的程序\n",
      "或批处理文件。\n"
     ]
    }
   ],
   "source": [
    "!pwd"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "38379685-20e3-4cb8-8c13-bcf57ae21b59",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.15"
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 "nbformat": 4,
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}
